Who is eligible for Medicare? US citizens and legal residents You must also meet one of the following requirements: Legal residents must live in the US for 5 consecutive years leading up to applying for Medicare People who are under 65 and qualify due to disability or other special circumstance People with ALS, ERSD, or permanent kidney failure that requires dialysis If you choose to work past 65 Medicare and your employer insurance can work together You can delay your enrollment without a penalty if your employer has more than 20 employees and your employer group plan also must be considered credible coverage If you enroll in any part of Medicare, you will no longer be able to contribute to an HSA Medicare will not cover dependents